Synthesis and light-emitting properties of a new conjugated polymer containing carbazole and quinoxaline moieties

A conjugated polymer consisting of carbazole and quinoxaline units (5) is synthesized in a high isolation yield (95\%). The polymer possesses a high molecular weight (similar to22kDa) and is completely soluble in common solvents. When 5 is used as an emitting layer in a multilayer electroluminescence (EL) device, it emits a blue light of 484 nm and exhibits a current efficiency of similar to0.7 cd/A